Advantages:

1.our company had done this business for many years and won a good reputaion for our top quality products and excenllent service.

2.we produce the drill bits according to our customers requirements strickly with advanced equipment to make the quality perfect.(extend work life,wear resistance,self-sharpening....)

3.if you want to get more details,pls don't hesitate to contact me.

Specifications:

IADC		437	517	537	617	637	737
WOB	KN/mm (bit dia.)	0.5-0.75	0.5-0.85	0.5-0.85	0.55-0.85	0.55-0.85	0.55-0.85
	Lb/in (bit dia.)	2860-4280	2860-4860	2860-4860	3140-4860	3140-4860	3140-4860
	r.p.m	70-45	70-45	70-45	70-45	60-40	60-40